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Finding the Fourth Proportional to 392,936.60, 589,404.90 and 235,083.80

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Solution

The fourth proportional to 392,936.60, 589,404.90 and 235,083.80 is: 352,625.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,936.60 : 589,404.90 = 235,083.80 : x
  2. Step 2: Convert to fraction form
    392,936.60/589,404.90 = 235,083.80/x
  3. Step 3: Cross multiply
    392,936.60x = 589,404.90 × 235,083.80
  4. Step 4: Simplify right side
    392,936.60x = 138,559,543,630.62
  5. Step 5: Solve for x
    x = 138,559,543,630.62/392,936.60
  6. Step 6: Final answer
    x = 352,625.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.